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ZJX controller experienced an operational error at FL200 when misjudging the spacing required during climb and descent actions.
| Attributes | |
| ACN | 648240 |
| Time | |
| Date | 200502 |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | navaid : omn.vortac |
| State Reference | FL |
| Altitude | msl single value : 20000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zjx.artcc |
| Operator | general aviation : corporate |
| Make Model Name | Falcon 2000 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | climbout : vacating altitude descent : intermediate altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zjx.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : vacating altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 18 |
| ASRS Report | 648240 |
| Person 2 | |
| Affiliation | company : corporate |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | atc equipment : conflict alert other controllera |
| Resolutory Action | controller : issued alert |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 25200 vertical : 200 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Aircraft X was climbing sbound after leaving jax approach. Assigned altitude was FL200. Air carrier Y was descending sbound on the bitho arrival for mco. Assigned altitude was FL210. When both aircraft were level; I checked the speeds which were compatible. Aircraft X was 5 mi behind air carrier Y; so I climbed the aircraft to FL310 and descended the air carrier Y at the same time. Conflict alert went off and I requested aircraft X to expedite climb. The ntad showed the aircraft were 4.2 mi apart.
Original NASA ASRS Text
Title: ZJX CTLR EXPERIENCED AN OPERROR AT FL200 WHEN MISJUDGING THE SPACING REQUIRED DURING CLB AND DSCNT ACTIONS.
Narrative: ACFT X WAS CLBING SBOUND AFTER LEAVING JAX APCH. ASSIGNED ALT WAS FL200. ACR Y WAS DSNDING SBOUND ON THE BITHO ARR FOR MCO. ASSIGNED ALT WAS FL210. WHEN BOTH ACFT WERE LEVEL; I CHKED THE SPDS WHICH WERE COMPATIBLE. ACFT X WAS 5 MI BEHIND ACR Y; SO I CLBED THE ACFT TO FL310 AND DSNDED THE ACR Y AT THE SAME TIME. CONFLICT ALERT WENT OFF AND I REQUESTED ACFT X TO EXPEDITE CLB. THE NTAD SHOWED THE ACFT WERE 4.2 MI APART.
Data retrieved from NASA's ASRS site as of January 2009 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.